166849 has 2 divisors, whose sum is σ = 166850. Its totient is φ = 166848.

The previous prime is 166847. The next prime is 166853. The reversal of 166849 is 948661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129600 + 37249 = 360^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 166849 - 2¹ = 166847 is a prime.

Together with 166847, it forms a pair of twin primes.

It is an Ulam number.

166849 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (166841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83424 + 83425.

It is an arithmetic number, because the mean of its divisors is an integer number (83425).

2¹⁶⁶⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

166849 is a deficient number, since it is larger than the sum of its proper divisors (1).

166849 is an equidigital number, since it uses as much as digits as its factorization.

166849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 166849 is about 408.4715412364. The cubic root of 166849 is about 55.0521818811.

The spelling of 166849 in words is "one hundred sixty-six thousand, eight hundred forty-nine".